﻿#include "maskwidget.h"
#include "qmutex.h"
#include "qapplication.h"
#include "qdesktopwidget.h"
#include "qdebug.h"

QScopedPointer<MaskWidget> MaskWidget::self;
MaskWidget* MaskWidget::Instance()
{
    if (self.isNull())
    {
        static QMutex mutex;
        QMutexLocker locker(&mutex);
        if (self.isNull())
        {
            self.reset(new MaskWidget);
        }
    }

    return self.data();
}

MaskWidget::MaskWidget(QWidget* parent) : QWidget(parent)
{
    mainWidget = 0;
    setOpacity(0.7);
    setBgColor(QColor(0, 0, 0));

    //不设置主窗体则遮罩层大小为默认桌面大小
    this->setGeometry(qApp->desktop()->geometry());
    this->setWindowFlags(Qt::FramelessWindowHint | Qt::Tool);

    //绑定全局事件,过滤弹窗窗体进行处理
    qApp->installEventFilter(this);
}

void MaskWidget::setMainWidget(QWidget* mainWidget)
{
    if (this->mainWidget != mainWidget)
    {
        this->mainWidget = mainWidget;
    }
}

void MaskWidget::setDialogNames(const QStringList& dialogNames)
{
    if (this->dialogNames != dialogNames)
    {
        this->dialogNames = dialogNames;
    }
}

void MaskWidget::setOpacity(double opacity)
{
    this->setWindowOpacity(opacity);
}

void MaskWidget::setBgColor(const QColor& bgColor)
{
    QPalette palette = this->palette();
    palette.setBrush(QPalette::Background, bgColor);
    this->setPalette(palette);
}

void MaskWidget::showEvent(QShowEvent*)
{
    if (mainWidget != 0)
    {
        this->setGeometry(mainWidget->geometry());
    }
}

bool MaskWidget::eventFilter(QObject* obj, QEvent* event)
{
    if (event->type() == QEvent::Show)
    {
        if (dialogNames.contains(obj->objectName()))
        {
            this->show();
            this->activateWindow();
            QWidget* w = (QWidget*)obj;
            w->activateWindow();
        }
    }
    else if (event->type() == QEvent::Hide)
    {
        if (dialogNames.contains(obj->objectName()))
        {
            this->hide();
        }
    }
    else if (event->type() == QEvent::WindowActivate)
    {
        //当主窗体激活时,同时激活遮罩层
        if (mainWidget != 0)
        {
            if (obj->objectName() == mainWidget->objectName())
            {
                if (this->isVisible())
                {
                    this->activateWindow();
                }
            }
        }
    }

    return QObject::eventFilter(obj, event);
}
